Hernandez will start Wednesday's game against Atlanta, Christina De Nicola of MLB.com reports.
The right-hander was called up from Triple-A Jacksonville on Monday and will start the final game of the season for Miami. Hernandez opened the season in the rotation but was demoted in early June. He enters Wednesday's start with a 6.33 ERA, 1.46 WHIP and 57:22 K:BB across 58.1 innings.